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| Titel |
Penetrative convection in stratified fluids: velocity and temperature measurements |
| VerfasserIn |
M. Moroni, A. Cenedese |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 13, no. 3 ; Nr. 13, no. 3 (2006-08-07), S.353-363 |
| Datensatznummer |
250011779
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| Publikation (Nr.) |
 copernicus.org/npg-13-353-2006.pdf |
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| Zusammenfassung |
| The flux through the interface between a mixing
layer and a stable layer plays a fundamental role in characterizing and
forecasting the quality of water in stratified lakes and in the oceans, and
the quality of air in the atmosphere. The evolution of the mixing layer in a
stably stratified fluid body is simulated in the laboratory when "Penetrative Convection" occurs.
The laboratory model consists of a tank filled with water and subjected to heating from below. The methods employed
to detect the mixing layer growth were thermocouples for temperature data and two image analysis techniques, namely Laser Induced Fluorescence (LIF)
and Feature Tracking (FT). LIF allows the mixing layer evolution to be visualized. Feature Tracking is used to detect tracer particle trajectories
moving within the measurement volume. Pollutant dispersion phenomena are
naturally described in the Lagrangian approach as the pollutant acts as a tag
of the fluid particles. The transilient matrix represents one of the possible tools available for quantifying particle dispersion during the
evolution of the phenomenon. |
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